The Walkman cassette player is a portable audio device introduced by Sony in 1979. It allows users to listen to music on cassette tapes through headphones, making it a revolutionary product for personal music enjoyment. The compact design and battery operation made it easy to carry, leading to its popularity among music lovers. Over the years, the Walkman evolved to include various formats, such as CDs and digital audio. Despite the rise of digital music players and streaming services, the Walkman remains an iconic symbol of personal music culture and nostalgia for many.